Belt-gearing.



- in lllllmf VPau-.enten Apr. 9, 1912.

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, BELT GEABING. APPLIGATION FILED ma. 2, 1906.

Patented Apr. 9, 1912.

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c uLUMBlA PLANMRAPH C0..WASH|NOTON, D.c.

Patentd Apr.

f4 SHEETS-S C. DE L. RICE.

BELT GEARING.

APPLICATION FILED 1mm, 190s.

1,022,756. v Patented Apr.9,1912.

4 BRIEFS-SHEET 4.

-coLUMBlA PLANDGRAPH co.. WASHINGTON. D, c.

lUNITED "STATES PATENT OFFICE. y

CHARLES DE LOS RICE, F HARTFORD, CONNECTICUT.

BELT-GEARING.

Specification of Letters Patent.

Patented Apr. 9, 1912.

Application led March 2, 1906. Serial No. 303,907.

ToaZZ 'whom t may concern.'

Be it known that I, CHARLES D. RICE, citi- -zen of the United States of America, residing at Hartford, in the. county of I-Iartford and State of Connecticut, have invented certain new and useful Improvements in Belt-Gearing, of which-the following is a'specification. -The object of the invention is to provide a beltU gearing `having features of novelty and advantage.

`Itis particularly well` adapted for use on metal working machines, such as drill presses, and is illustrated as applied to such amachine.

f In the drawings-Figure l is a general side elevation of a portion of a drill'press showing4 the application Vof (my belt gearing r`Pthereto. Fig. 2 is a rear View of thefpart e `of 'the machine shown in' Fig. 1. Figi` 3 is "'f201 a top viewfofthe same. Fig. 4t is a detail in* section onv enlarged scale of the eccentric Vmounting of `oneA ofthe -idler pulleys. Fig,

5 is a side View of the device'shown in Fig. 4. Figs. Gand 7 are side land rear views of 525 affmodification in'which themembers sup porting the idl'ers may 'be-1 adjustedv itvertilf cally.

fA-)Referring'toithe drawings@ is a -partof `thepedestal of the machine, b the upright, c

"'s the bracketssupporting'the counter shaft d on which is mountedthe two-step counter i' shaft pulley e. d

- f isan overhanging armat the top ofthe upright supportingthe-spindle gaon which iis mounted the"twostep,spindlepulley 71..

- z'- is the :belt passing around the spindle and' counter sh'aftpulleysand over idler ,s pulleys 1- 2. The delivery idler lis provided with means for rais-ing #and lowering T540 it so that it will-track with'either step of i supported-on apin 2lbwhich is carried by a e the spindle-pulley, thismeans comprising aneccentric bushing la mounted-in afsuitfable A'housing lb and having4 a pin lc on lwhich thepulley is mounted. -A-pin ld' is handle 'by l which to `turn --the bushing to either -posit-ion,the handleY moving in aslot 19in the 'housing 1b. Thereturn idler 2 is] mounted 'in a yoke 2a which-- is pivotally fcarrier`2c carried by a rod 21 which is mounted in the sleeve 2e supported at-the top off the `upright. 2 The carrier 2 iswadjustable lengthwise of the rod 2d in order to take up thefslack in' the belt and keep it at` its de-` ent speeds.

In order that thisA belting arrangement shall work to the best advantage it is advisable to have the face of the return idler square to a line tangent to whichever step of the spindle pulley the belt is operating on.

AFor instance, when the driving conditions are as shown in Figs. l, 2 and 3 the face of the pulley should square to a tangent of the larger step of the spindle pulley,I as illustrated in Fig. 3. In' order to insure such 'an arrangement of the parts I provide a tiller rod 3 which at one end is attached to the yoke 2a. rAt'th'e forward end of the rod 2d is securedthe bracket 4 having two notches 4a 4b, one of which is in a vertical plane tangent to the larger and the other to -the smaller step of the counter shaft pulleys.l`

In one ofthese notches the tiller rod rests, according to whether thefl'arger of smaller step of the pulley is being used. It isse-l v cured to the yoke directly over the center of the-return idler and the arrangement f in# sufres thatthe "idler will be turned to proper position to receive the belt Vfrom the pulley 4no matter what its position is along the rod 2d. This provideswhat might be `termed a fixed'` adjustment for the return idler.A

In the modification of Figs. 6 and 7 a rod l0 is mounted eccentrically in a bushing 2O which is supported in a sleeve 30 upstanding from the top of the column. On

`this rod both the delivery and return idlers are supported. The bushing is provided withfthe handlek pin 40 by means of which it may be turned from'one position to another,

Vthe ypinwcl rking'inthe slot 20a in order to raise orlower the idlers. To prevent the rod-l0 from rolling over during this raising and-lowering operation astem 50 projects downwardly from the `rod and passes through an eye which is permitted of such turningmotion as is necessary to ao- `am able to drive the spindle atfour differv commodate the travel of the stem with the rod from high to lower position. The detail arrangement of the idlers and pulleys is the same as shown in Figs. l, 2 and 3 except that both the idlers are adjustable vertically. Pairs of pulleys of different diameters on each shaft may be used in place of the two-step pulleys shown.

I claim as my invention:

1. In a beltgearing for drill presses and similar machines a counter-shaft extending lengthwise of the machine, a spindle parallel to a vertical plane passing through the axis of said counter-shaft, and pulleys of different diameters mounted on said spindle and said shaft, an endless belt, idler pulleys for the delivery and return sides of said belt, said delivery idler being vertically adjustable, and said return idler being adjustable back and forth horizontally to take up slack, a swiveled support therefor to permit of its adjust-ment in a horizontal plane, and positive means for causing said return idler to track with eitherl one of the spindle pulleys.

2. In a belt gearing for drill presses and similar machines, a counter-shaft extending lengthwise of the machine, a spindle parallel to a vertical plane passing through the axis of said counter-shaft, pulleys of different diameters on said spindle and said counter-shaft, an endless belt, idler pulleys for the delivery and return sides of said belt, said delivery idler being vertically adjustable, and said return idler being adjustable back and forth horizontally to take up slack, and devices for alining said return idler with either of said spindle pulleys comprising a swiveled support for said idler and means for holding said idlerrwith its face squared to a vertical plane tangent to either of the spindle pulleys.

3. In a belt gearing for drill presses and similar machines the combination with the spindle, the counter shaft, a pair of pulleys of different diameters mounted on each, an endless belt, idler pulleys for the delivery and return sides of said belt, said delivery idler being vertically adjustable and said return idler being adjustable back and forth horizontally to take up slack, the relative position of said return idler and the pulleys on the countershaft being adjustable in the direct-ion transverse to the planes of rotation of the latter to cause said belt to track with either of the pulleys on said countershaft of devices for alining said return idler with either of said spindle pulleys including a swivel support for said idler, and means for holding said idler with its face squared to a vertical plane tangent to either of the spindle pulleys, said means comprising a tiller rod having one end secured to the swiveling support of the idler and its free end held against sidewise movement.

4. In a belt gearing for drill presses and like machines the combination Vwith the counter shaft and spindle, a pair of pulleys of different diameters on each, the belt and idler pulleys for said belt, a common support for said idlers, said support comprising a rod, a bushing in which said rod is eccentrically mounted, and a sleeve in which said bushing moves.

5. In a belt gearing for drill presses and like machines the combination with the counter shaft and spindle, a pair of pulleys of different diameters on each, the beltand idler pulleys for said belt, a common support Afor said idlers, said support comprising a rod, a bushing in which said rod is eccentrically mounted but free to turn therein, a sleeve in which said bushing moves, means for turning said bushing, and means for preventing the rolling of said rod during the turning of the bushing.

6. In a belt gearing for drill presses and like machines the combination with the counter shaft and spindle, a pair of pulleys of different diameters on each, the belt and idlers for said belt, a common support for said idlers, said support including a rod, a bushing in which said rod is eccentrically mounted, but free to turn therein, a sleeve in which said bushing moves, means for turning said bushing, and means for preventing the rolling of said rod during the turning of the bushing comprising a guide stem and a rotatable support therefor.

7 In a belt gearing for drill presses and similar machines the spindle, the counter shaft, a pair of pulleys of different diameters on eachan endless belt, a vertically adjustable idler pulley for the delivery side of said belt, an idler pulley for the return side of said belt adjustable back and forth horizontally to take up slack, a swivel support for said return idler permitting it to swing in a horizontal plane to track with either spindle pulley, a tiller rod secured to said swivel support over the center of said idler pulley and extending toward the spindle pulleys, and a bracket to support the free end of said tiller rod, said bracket having notches, corresponding to each spindle pulley, in which said rod rests.

8. In a belt gearing for drill presses and similar machines, the combination with a machine frame, a driving shaft extending lengthwise thereof, a driven shaft parallel to a vertical plane passing through the axis of said driving shaft, pulleys of different diameters on said driving and said driven shaft, an endless belt, idler pulleys for the delivery and return sides of said belt, and mechanism for shifting said return idler to effect the tracking relation of it with either spindle pulley.

9. In a belt gearing for drill presses and similar machines, a driving shaft extending lengthwise of the machine, a driven similar machines, a driving shaft extending' lengthwise of the machine, a driven shaft parallel to a vertical plane passing through the axis of said driving shaft, a pulley on one shaft,pulleys of different diameters on the other shaft, and a flat belt, of arotatable supporting member, an arm carried thereby but arranged eccentrically with respect thereto whereby rotation of said supporting member will cause said arm to move in a circular path, means for holding said supporting member and arm in different positions, and a belt-engaging element carried by said arm.

y ll. In a belt gearing for drill presses and similar machines, the combination with a driving Vshaft extending lengthwise of the machine, a driven shaft parallel to a vertical plane passing through theaXis of said driving shaft, and pulleys of dierent diameters on each shaft, of a power transmitting belt connecting the same, a rotatable crank member, means for rotating and holding the crank member in different'positions, and a beltengaging element mounted on the crank member.

In testimony whereof I ai'IiX my signature in presence of two witnesses.

CHARLES DE LOS RICE. Vitnesses:

W. M. BYORKMAN, ED. S. MCALL.

Copies of this patent may be vbtained for ve cents eaclh, by addressing the Commissioner of Patents, Washington, D. C. 

